Sealing tool



H. F. STOFFEL Nov. 3, 1953 SEALING TOOL Filed Dec. 7, 1950 INVENTOR.

Patented Nov. 3, 1.953

UNITED STATES PATENT OFFICE SEALING TOOL Hans F. Stofifel, Scarsdale, N. Y.

Application December 7, 1950, Serial No. 199,615

1 Claim.

The invention relates to scaling tools and more particularly to scaling pliers for attaching lead or aluminum seals to fastening members.

The novel tool is intended for lead or aluminum seals of the type having one or more holes through which the ends of a Wire or other fastening member such as cord or the like may be passed, the tool being used to compress the seal after assembly to the fastening member so that the latter becomes firmly embedded in the seal.

The object of the invention is to provide a tool that not only serves to compress the seal as described, but also to mould it in a manner whereby the contour and shape is altered to improve the appearance as well as the tamperproofness of the seal.

Another object is to improve the construction of the tool so that a maximum force can be produced with a minimum effort, the novel construction also permitting quick removal or replacement of parts and easy adjustment of the stroke to control the thickness of the seal.

Other objects and advantages of this invention will be apparent from the following description considered in connection with the accompanying drawing submitted for the purpose of illustration and not to define the scope of the invention, reference being had for that purpose to the subjoined claim. In the drawing, wherein similar reference characters refer to similar parts throughout the several views:

Fig. 1 is a side elevation of the hand tool;

Fig. 2, a fragmentary sectional side elevation;

Fig. 3, a perspective view of a seal illustrative of the type for which the tool is used;

Fig. 4, a perspective view of the same seal after it has been assembled to a fastening member and moulded by means of the hand tool;

Fig. 5, a perspective view of the pressure plate; and

Fig. 6, a perspective view of the die member.

Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawing, since the invention is capable of other embodiments and of being practiced or carried out in various ways. 4 Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not limitation.

The improved tool comprises a yoke I carrying a removable die 2 having a cavity 3 and diametrically opposed slots 4 which accommodate a fastening member such as the ends of wires or cords 5 inserted through holes 6 of seal 1 whose finished appearance after compression in the hand tool is illustrated in Fig. 4. The invention is not limited to a tool for the particular shape of seal shown as the mould may be shaped to produce other forms. The upper portion of yoke I is slotted to accommodate levers 8 and 9 pivoted to yoke I at III and II, respectively. Lever 8 carries a removable punch l2 positioned to cooperate with die 2 and to be concentric therewith when brought together as by bringing down the handle portion of lever 9 where it hits stop I3 extending from lever B. To produce this action lever 9 has a cam I4 acting against a pressure plate I5 retained by the shank of punch I2 engaging hole 2 I. Thus plate I5 may easily be removed simply by lowering punch I2 or by the removal of lever 9, and the stroke of punch I2 or the degree of insertion into die 2 may be changed by replacing plate I5 with one of another thickness. Besides controlling the stroke of punch I2, the purpose of plate I5 is to reduce the sliding friction of cam I4, as plate I5 is made of a material causing minimum friction and withstanding maximum wear. It is also apparent that if wear has occurred plate I5 can be replaced cheaply, and a further saving is obtained as lever B can be made of cheaper material. The tool is shown in the open position into which it is urged by spring I6 seated in bores I! of levers 8 and 9. In this position plate I5 presses against the fiat portion I8 of lever 9 to yieldingly hold the latter as shown. An abutment I9 stopping against plate I5 prevents further opening of lever 9. The punch or die may be embossed or engraved as at 20 to produce certain indicia or markings, indicated for example by the letter A on the face of the seal shown in Fig. 4.

To attach a seal the fastening member 5 is threaded through holes 6 and then the seal is inserted into cavity 3 so that the fastening member rests in slots 4. When lever 9 is brought down the movement of punch I2 to approach die 2 is rapid due to the cam action of lever 9, then decreases while the leverage and consequently the force is increased towards the end of the stroke where seal 1 is compressed to conform to cavity 3 so that a seal of the shape shown in Fig. 4 results. By releasing lever 9 spring I6 returns the levers to their original positions in relation with each other so the punch and die are separated and the finished seal can be removed.

I claim:

A hand sealing tool for compressing a seal of soft ductile metal, comprising a yoke carrying a die member having a cup shaped cavity adapted for moulding said seal, a lever pivoted to said yoke and carrying a punch arranged opposite said die member to cooperate with said die member, a cam lever pivoted to said yoke and acting against said lever to force said punch and said die member together, and a removable thrust plate between said lever and said cam lever, said thrust plate being held in place by said punch.

HANS F. STOFFEL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 535,932 Wenthe Mar. 19, 1895 1,394,165 Gibson Oct. 18, 1921 

